Multiplayer ? etc

as i know, multiplayer is a lot of player is one screen.
world boss will see a lot of player together.

D4 Multiplayer…4 party in a group.
12 players in world boss means 3 groups maximum allow in 1 world boss ?
or …

sorry, idk the math.
world boss shall be no limitation of the player number ?

world boss arrangement will be 1 respawn per day only and few respawn per week ?
really ?

hope set up player cannot downgrade (-10 lvl) to kill world boss, yes u can group or lead other player to kill but less exp or loot. (shall be no any exp or item)

and the time, hope set the world boss time always appear in game like normal clock,
let player settting or chose which world boss clock to appear or attention. before 30 minits shown the clock is not suitable for non full time gamer or streamer.

I juz can play the D4 when im free, world boss clock always shown is easier. or set up 1 web site page to show all world boss clock, and available to set local time for every player. ( I always copy the date n time n google when in beta, or calculation the time GMT / ET / PDT in my head is bad) use time buddy ? na…i miss world boss bcz this stuff. when US/EUR in afternoon, midnight here, i go to sleep when the 1st world boss appear in beta bcz delay)

and 1 more thing. player cannot mark anything in the map.
plz refer genshin impact map, player can mark any thing.

I find lock chest but no key, go back town n buy key, after that…" where the hell the locked chest" ?